Twisting-head for thread-dressing machines.



NOL 731,883. PATENTED JUNE 23, 1903.

G. A. FREDENBURGH.

TWISTING' HEAD FOR THREAD DRESSING MACHINES. APPLICATION FILED DBO. 24, 1902.

N0 MODEL.

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UNITED STATES PATENT Patented June 23, 1903.

OFFICE.

TWlSTING -HEAD FOR THREAD-DRESSING MACHINES.

SPECIFICATION forming part of Letters Patent N 0. 731,883, dated June 23, 1903. Application filed December 24, 1902. Serial No. 136,461. (No model.)

; T on whom it may concern:

Be it known that I, GEORGE A. .FREDEN- BURGH, a citizen of theUnited States, residing at the city of Pawtucket, in the county of Providence and State of Rhode Island, have invented a certain newand useful Improvement in Twisting-Heads for Thread-Dressing Machines, of which the following is a 1 specification.

My invention relates to a twisting-head adapted for a thread-dressing machine; and theobject of my invention is to provide a thread-twisting device of simple and comindependent of the other pact construction, so that a large number of twisters may be mounted on the said machine, each twisting-head twister operated and each twistinghead twister provided withmeans for the ready insertion of a thread in case of breakage during the running of the machine.

The invention consists of the novel construction and combination of the several parts, as hereinafter described, and specificaview, partly in section 3 1 of Fig. 3. Fig. 3 is a top plan view of a seally set forth in the claims.

1 In the accompanying drawings, Figure 1 represents a front sectional elevation view of a thread twister embodying my improvement, taken in line X-X of Fig. 2. Fig. 2 is and partly in elevation, of the twister-head, taken in line Y Y ries of twisting-heads as mounted in brackets secured to the machine-frame, and also showing each twisting-head twister provided with a shipping-lever. Fig. 4 is a top plan view of the front end portion of the bracket provided with a circular channel arranged to receive rollers for the twisting head; and

Fig. 5 is apartial top plan view, taken in Z Z of Fig. 2, of thefrontportion of the bracket with its stud-shaft mounted thereon andthe gear for rotating said .stud-shaft, and also suitable means thereon.

is providedwith a spline showing the slot arrangement for the insertion of the thread to be twisted.

. 3 Similar letters of reference designate corresponding parts in theseveral views.

In the drawings, A indicates a shaft by which the twisting-head is driven, and this shaft is rotatably mounted longitudinally on the frame of the machine and is revolved by This driving-shaft b, which extends throughout its length. A beveled gear 0 is slidably mounted on the shaft A and has a hub c With a peripheral groove in which a shipping-lever d is supported, and said shipping-lever is pivoted on a bolt cl, which is secured in a projecting ear d of the machineframe B.

e is a bracket, which has one end rigidly secured to the machine-frame by a bolt f, and this bracket extends horizontally from the machine-frame, and near its outer or front end is provided a circular vertical opening g, and in the upper surface of the said bracket e and concentric to its opening'g is formed a V-shaped channel or ball-bearing g. The bracket 6 is further provided with a narrow slot 9 extending longitudinallythrough from the front end of the bracket and entering the opening 9 in the manner as seen in Fig. at.

h is a circular ball-bearing head having a centrally-projecting shank h integral therewith and adapted to fit loosely in the circular opening 9 of the said bracket e, and this circular head is provided with a V-shaped chan: nel or ball-bearing 7L formed in its inner or bottom surface and so arranged that when the head it is mounted in position upon the bracket 6 its channel k will be inverted to thatof the first-named channel 9' of the bracket and of the same size and location with the channel in the same, thus forming bearing-surfaces for ball-rollers t i. The head It and its shank h is further provided with a narrow radial slot g extending through to the axial center thereof, as shown inFigs. 2 and 5. Wire arms j and j are mounted and rigidly secured upon the upper surface of the head h by screws 7c is, which enter the same, and one of said arms,which extends vertically from the head it, has a small circularly-bent thread-eye Z, situated concentric to the axial center of the head It, while the otherflwire arm j, which is one-half the height of the first-named arm, has a similar thread-eye Z, whose center is offset from the center of the said head 7t and to the rear of the the same.

c is a beveled gear,which is keyed or otherwise secured to the shank h of the head it, and said gear is provided with a narrow radial slot 9 which extends to the axial center slot g in thereof, as shown in Figs. 2 and 5. The radial slots 9 and g of the said head It and its shank and said gear 0 come in alinement with the slot 9 of the bracket e, as seen in Fig. 5, so that a thread m can pass through all of said slots to a central position, and from these slots the thread passes through the eye Z of the offset armj, situated to the rear of the slot g in the head h, as shown in Fig. 2, and from the thread-eye Z the thread passes up through the thread-eye Z of the arm j, which directs the thread again to its vertical position centrally of the twisting-head h, as shown in said figure, and from the thread-eye Z the thread is carried up to the brush-cylinders and ironer-cylinders, (not shown,) and which cylinders perform the operation of laying the fibers and polishing preparatory to finishing the thread. The thread m comes up from a sizing box or trough (not shown) situated below the hereinbefore-described twisting-head,and in order to have the thread move centrally of the said twisting-head and without its coming in contact with the driving-shaft A the teeth of the beveled gears c and c? are made to extend at an offset radially from the,

axial center of the said gears, so that an olfset is provided between the surface of the said shaft A and the center of the said twisting-head, thus permitting a free space or clearance for the vertical movement of the thread to the twisting-head in the manner as shown in Fig. 2. By having the thread-eye Z of the wire armj located at an offset from the vertical center of the twisting-head causes the thread to bear against the edge at the inner end of the slot in the twisting-head h at a point 'm, whereby the twist is formed in the thread up from this point in the said twisting-head through the rotative movement of 'the gear 0 which meshes with the gear 0' of the driving-shaft, and, furthermore, by having the said thread-eye Z offset, as described, prevents the thread 'm from leaving the slot 9 during the rotation of the twisting-head. The speed of rotation of the twisting-head is much greater than that of the movement of the thread, and by having the ball-rollers interposed between the circular head h and its bracket 6 the amount of friction caused by the fast revolving speed of the said circular head is much lessened.

When a thread breaks during the running of the machine, all that is required on the part of the operator is to throw back the shipping-lever d, which movement will carry the slidable gear 0 from engagement with the gear 0 (see Fig. 3,) after which he will rotate the latter gear to bring its slot g and the slot 9 in its circular head in alinement with the slot 9 of the bracket to the position as indicated in Fig. 5. The thread is then tied and replaced in the slots and the twistinghead again started.

From this description of the slot arrangement for a thread-twisting head it will be observed that the thread can be quickly inserted or taken out of the twister, as the case may require.

This construction of a thread-twister mechanism forms a very simple and compact arrangement of parts adapted for a threaddressing machine, inasmuch as a large number of twisters can be mounted consecutively upon the machine-frame, and each twister being independent of the other and provided each with a shipping-lever for throwing into or out of engagement with the driving-shaft.

This invention is an improvement upon the thread-dressing machine shown and described in Letters Patent of the United States, No. 702,786, issued to me June 17, 1902.

I claim as a novel and useful invention and desire to secure by Letters Patent- 1. In a twisting-head for a thread-dressing machine, a device consisting of a bracket rigidly secured to the machine-frame and provided with a longitudinal slot extending from the front end of said bracket, and entering a vertical circular opening formed in the same; a rotatable head mounted on said bracket and having a centrally-projecting stud-shaft integral therewith and loosely entering through the circular opening of said bracket; a beveled gear rigidly secured upon the studshaft of said head; said head and its studshaft and said gear being radially slotted to allow the passage of a thread to its geometrical center, two vertical arms rigidly secured upon said head and having a threadeye at each upper portion thereof; one of said arms made longer than the other and whose thread-eye is centrally with the axial center of said head, while the thread-eye of the other or shorter arm is offset to the rear of the slot in the same, and so arranged that the eye of the shorter arm guides the thread in a zigzag course from the closed end portion of the slot in said head to its central position in the eye of the longer arm, and means to operate the rotative parts of the device, substantially as set forth.

2. In a twisting-head for a thread-dressing machine, the combination of a shaft rotatably mounted on the machine-frame and provided with a longitudinal spline; a beveled gear slidably mounted on said shaft; abracket rigidly secured to the machine-frame and provided with a longitudinal slot which enters a vertical circular opening formed in said bracket; a rotatable stud-shaft mounted in the opening of said bracket and having an enlarged circular head integral at one end thereof; a beveled gear rigidly secured at the other end of said stud-shaft; said stud-shaft and its head and said last-named gear having a radial slot to allow the passage of a thread to their axial center, a thread-guide fixed upon the circular head of said stud-shaft and arranged to direct the thread in a diagonal course from the opening in the axial center of the said circular head; a second threadguide fixed upon the head of said stud-shaft and arranged to direct the thread from the first said guide tothe axial centerof said head; and a shipping-lever pivoted on the machine-frame and arranged to disconnect the two beveled gears, substantially as specified.

3. In a twisting-head for a thread-dressing machine,the combination of a horizontal shaft rotatably mounted on the machine-frame and l having a longitudinal spline; a beveled gear slidable on said shaft and having ..its teeth radiallyolfset from the longitudinal center thereof; a bracket rigidly secured to the machine-frame and provided with a circular V- shaped channel in its upper surface; avertical stud-shaft mounted in said bracket and having a circular head integral therewith and provided with a V-shapedchannelin its lower surface of the same size and location as the a l first-named channel; roller-balls mounted in the channels of said bracket and head of said stud-shaft; a beveled gear rigid on said studshaft and having its teeth radially ofiset from the longitudinal center thereof ,said bracket, said stud-shaft and its head, and said lastnamed gear provided each with a slot to allow the insertion of a thread, a thread-guide rigid upon thecircularhead of said studa shaft and arranged to direct the thread in a diagonal course from the opening in the axial center of the said circular head; athreadguide rigid upon the circular head of said stud-shaft and arranged to direct the thread fromithe first said guide to the axial center of said head; and a shipping-lever arranged enlarged circular head or to disconnect the said two beveled gears, substantially as shown and described.

4. In a twisting-head for a thread-dressing machine, the combination of a shaft rotatably mounted on the machine-frame and provided with a longitudinal spline, a beveled gear slidaby mounted on said shaft, a bracket riggear rigidly sestud-shaft and arranged to direct the thread in a diagonal course from the opening in the axial center of the said circular head, another thread-guide fixed upon the flange of said head and arranged to direct the thread from the guide to the axial center of said head, and a shipping-lever pivoted onthe machineframe and arranged to disconnect the two bevel-gears, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses. V

GEORGE A. FREDENBURGH. Witnesses:

ALONZO R. WILLIAMS, ELMER WALKER. 

